An investigation has been launched after a train guard was threatened by two men who left the train at Pevensey and Westham.
Officers have issued images of two men they want to speak to in connection with the incident, which took place on July 12 on board the 6.57pm Bexhill to London Victoria express service.
PC Pete Cooke said: “Two men boarded at St Leonards Warrior Square and held the doors open, shouting at people who were leaving the train. They were approached by the guard who told them to stop, and the train moved off.
“As the guard walked through coaches three and four, he saw the men harassing a group of young people. When asked for their tickets they were unable to produce any, and both then started shouting and swearing at the guard, making him feel very threatened for his safety and that of the passengers.”
Both men then left the train at Pevensey & Westham station at 7.15pm.
PC Cooke added: “This was a frightening and intimidating experience for the member of staff and the passengers, all of whom should be able travel on the rail network without fear of violence or abuse.”
Anyone with information should contact British Transport Police on 0800 40 50 40 or text 61016 quoting reference B4/LSA of 20/08/2013, or call independent charity, Crimestoppers, anonymously on 0800 555 111.